we expect fairly soon the newtown state police to hold a conference here in newtown. you're looking at the microphones being set up right now. connecticut state police will update us on the investigation. president obama also will be here in newtown later this afternoon to thank first responders to meet with some of the victims' families. he'll also speak at this evening's interfaith vigil starting at 7:00 p.m. eastern. we'll have live coverage, of course, of the interfaith individualvigil. we learned this morning of the autopsies of the gunman and his mother. more information on that coming up. >>> when newtown police stormed into sandy hook elementary school here in the small community, illustrated a shift in the tactical approach that law enforcement has taken in light of the columbine shooting, some 13 years ago. joining us now for a closer look at how law enforcement is dealing with it, what has, unfortunately, become a tragic and sad chapter in america's history. former fbi profiler tom fuentes, assistant director of the fbi and jim johnson, chairman of the, he'